Apparatus for promoting circulation in steam-boilers. |
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申请号 | US1912707794 | 申请日 | 1912-07-05 | 公开(公告)号 | US1179141A | 公开(公告)日 | 1916-04-11 |
申请人 | OLIVER PRESCOTT MACFARLANE; SIDNEY JOHN ROSS; SCHOFIELD HARRY; SEDGWICK CECIL HOWARD; | 发明人 | SCHOFIELD HARRY; SEDGWICK CECIL HOWARD; | ||||
摘要 | |||||||
权利要求 | |||||||
说明书全文 |